NetBSD/sys/arch/sun3/stand
gwr 60212a408a Use twiddle() in libsa (mycroft's changes) 1995-02-24 05:06:43 +00:00
..
boot Use twiddle() in libsa (mycroft's changes) 1995-02-24 05:06:43 +00:00
bootxx Use twiddle() in libsa (mycroft's changes) 1995-02-24 05:06:43 +00:00
installboot compiles, but... 1995-02-14 22:56:36 +00:00
libsa Use twiddle() in libsa (mycroft's changes) 1995-02-24 05:06:43 +00:00
Makefile compiles, but... 1995-02-14 22:56:36 +00:00
Makefile.inc compiles, but... 1995-02-14 22:56:36 +00:00
README compiles, but... 1995-02-14 22:56:36 +00:00

README

/*	$NetBSD: README,v 1.1.1.1 1995/02/14 22:56:36 gwr Exp $ */

The sun bootblocks are split into two parts: a small 1st-level program that
gets written right after the superblock in a partition (and is hence limited
in size to SBSIZE - DEV_BSIZE bytes), and a 2nd-level program that resides
in the filesystem proper.

The 1st-level program is loaded into memory by the PROM. It loads the second
stage program from a set of filesystem block numbers that are hard-coded
into it by the `installboot' program. The prototype code for the 1st-level
bootblocks are in `bootxx'.

The 2nd-level program (`boot') is normally installed in the root directory
as `/boot'. It uses the device drivers in the PROM and the stand-alone
filesystem code in `libsa.a' to locate and load the kernel.

Use the following command to install the 1st-level bootblocks in the
root filesystem (on `sd0a') using the file `/boot' as the second level
boot program:

	installboot /boot bootxx /dev/rsd0a